自動デプロイ後にCSSが反映されない時の対処法を実践してみたがエラーが発生しました。

前提・実現したいこと

ここに質問の内容を詳しく書いてください。
自動デプロイした後、Githubでmasterにアップした後、
EC2で自動デプロイするとCSSが表示されなくなった。

発生している問題・エラーメッセージ

[ec2-user@ip-172-31-45-251 nostalgia]$ sudo less /var/log/nginx/error.log
2020/11/16 07:37:24 [error] 29011#0: *555 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su
ch file or directory), client: 103.5.140.149, server: 54.248.24.69, request: "GET /assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css HTTP/1.1",
 host: "54.248.24.69", referrer: "http://54.248.24.69/"
2020/11/16 07:37:32 [error] 29011#0: *555 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su
ch file or directory), client: 103.5.140.149, server: 54.248.24.69, request: "GET /assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css HTTP/1.1",
 host: "54.248.24.69", referrer: "http://54.248.24.69/"
2020/11/16 07:37:34 [error] 29011#0: *557 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su
ch file or directory), client: 103.5.140.149, server: 54.248.24.69, request: "GET /assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css HTTP/1.1",
 host: "54.248.24.69", referrer: "http://54.248.24.69/"
2020/11/16 07:38:09 [error] 29011#0: *555 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su
ch file or directory), client: 103.5.140.149, server: 54.248.24.69, request: "GET /assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css HTTP/1.1",
 host: "54.248.24.69", referrer: "http://54.248.24.69/"
2020/11/16 07:38:36 [error] 29011#0: *557 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su
ch file or directory), client: 103.5.140.149, server: 54.248.24.69, request: "GET /assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css HTTP/1.1",
 host: "54.248.24.69", referrer: "http://54.248.24.69/items"
2020/11/16 07:38:44 [error] 29011#0: *555 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su
ch file or directory), client: 103.5.140.149, server: 54.248.24.69, request: "GET /assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css HTTP/1.1",
 host: "54.248.24.69", referrer: "http://54.248.24.69/items"
2020/11/16 07:38:55 [error] 29011#0: *557 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su
ch file or directory), client: 103.5.140.149, server: 54.248.24.69, request: "GET /assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css HTTP/1.1",
 host: "54.248.24.69", referrer: "http://54.248.24.69/items"
2020/11/16 07:40:11 [error] 29011#0: *584 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su
ch file or directory), client: 103.5.140.149, server: 54.248.24.69, request: "GET /assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css HTTP/1.1",
 host: "54.248.24.69", referrer: "http://54.248.24.69/items"
2020/11/16 07:41:12 [error] 29011#0: *585 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su
ch file or directory), client: 103.5.140.149, server: 54.248.24.69, request: "GET /assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css HTTP/1.1",
 host: "54.248.24.69", referrer: "http://54.248.24.69/users/1"
2020/11/16 07:41:34 [error] 29011#0: *584 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su
ch file or directory), client: 103.5.140.149, server: 54.248.24.69, request: "GET /assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css HTTP/1.1",
 host: "54.248.24.69", referrer: "http://54.248.24.69/"
2020/11/16 07:41:37 [error] 29011#0: *585 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su
ch file or directory), client: 103.5.140.149, server: 54.248.24.69, request: "GET /assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css HTTP/1.1",
 host: "54.248.24.69", referrer: "http://54.248.24.69/"
2020/11/16 07:42:20 [error] 29011#0: *584 open() "/var/www/nostalgia/public/assets/application-bd27d8a19976d1f442130770741a52ef0e54af51b09d239d898a2c593a0957ab.css" failed (2: No su

多過ぎたので残りはスクリーンショット
https://gyazo.com/abdca666a20d3bbd142b152260e832b8

該当のソースコード

stlye.css
1@ -445,11 +445,11 @@ i {
2  transition-timing-function: ease-in;
3}
4
5/* .button {
6.button {
7  background-image: -moz-linear-gradient(top, rgba(255, 255, 255, 0.05) 1%, rgba(0, 0, 0, 0.2) 100%);
8  background-image: -webkit-linear-gradient(top, rgba(255, 255, 255, 0.05) 1%, rgba(0, 0, 0, 0.2) 100%);
9  background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1%, rgba(0, 0, 0, 0.2) 100%);
10} */
11}
12
13ul {
14  margin: 0;
15@ -648,16 +648,9 @@ body {
16h1,
17h2,
18h3,
19
20
21h4,
22body {
23  text-align: center;
24  color: #666;
25  font-size: 18px;
26}
27
28
29h5,
30h6,
31body {
32  line-height: 1.57;
33  letter-spacing: 0.15em;
34@ -665,26 +658,8 @@ body {
35  color: #666;
36  font-family: 'Unica One', "Avenir", "游ゴシック", "YuGothic", "ヒラギノ角ゴ Pro W6", "HIragino Kaku Gothic Pro W6", "HIragino Kaku Gothic Pro", Osaka, Meiryo, "メイリオ", "ＭＳ Ｐゴシック", "MS P Gothic", sans-serif;
37  margin: 0;
38  text-align: center;
39}
40
41h5,
42body {
43  font-size: px;
44  color: #666;
45  
46  margin: 0;
47  text-align: center;
48}
49
50
51h6,
52body {
53  margin : 50px 100px;
54  text-align: left;
55}
56
57
58a {
59  text-decoration: none;
60  color: #666;
61@ -707,9 +682,9 @@ div.contents.row div.content_post p {
62  font-size: 2em !important;
63}
64
65/* ::selection {
66::selection {
67  background: #D8D8D8;
68} */
69}
70
71.transition,
72a,
73@ -751,7 +726,7 @@ header.header div.header__bar.row div.grid-6 a.post:hover {
74}
75
76.title--big {
77  font-size: 2.5em;
78  font-size: 1.5em;
79  font-weight: bold;
80}
81
82@ -847,10 +822,10 @@ header.header .user_nav ul li a {
83  border-bottom: 1px solid #d8d8d8;
84}
85
86/* .form {
87.form {
88  background: url(https://dl.dropboxusercontent.com/u/5840617/DeathtoStock_Wired3.jpg);
89  background-size: cover;
90} */
91}
92
93.form .contents {
94  position: absolute;
95@ -885,16 +860,14 @@ div.contents.row .new_user {
96
97div.contents.row div.content_post {
98  margin: 20px 0;
99  display: flex;
100  justify-content: center;
101  align-items: center;
102  padding: 30px;
103  position: relative;
104  height: 400px;
105  color: #fff;
106  /* background-size: cover;
107  background-position: center center; */
108  background-size: cover;
109  background-position: center center;
110  border-radius: 3px;
111  /* box-shadow: 0 0 10px rgba(41, 41, 41, 0.2); */
112  box-shadow: 0 0 10px rgba(41, 41, 41, 0.2);
113}
114
115div.contents.row div.content_post:after {
116@ -1091,17 +1064,4 @@ footer p {
117  /* object-fit: contain; */
118  /* background: cover; */
119  max-height: 100%;
120}
121
122 .a {
123  font-size: 3em;
124  letter-spacing: -2px;
125  margin-bottom: 30px;
126  text-align: center;
127}
128
129.p{
130  font-size: 1.1em;
131  line-height: 1.7em;
132  margin: 0 0 10px;
133

試したこと

IPアドレスを開くとCSSが表示されず、
一度、EC2でps aux | grep unicornで立ち上がっているものをkillして、
RAILS_SERVE_STATIC_FILES=1 unicorn_rails -c config/unicorn.rb -E production -Dで立ち上げて、ローカル上でbundle exec cap production deployを行い、
再度、IPアドレスを開いたのですが、結果は変わりませんでした。