Podファイルで'AFHTTPRequestOperationManager.h' file not foundのエラー

環境はSwift4 Xcode Version 10.2.1です。

新バージョンリリース時に、アプリのアップデートを促すために、こちらのPodファイルを利用しました。
https://github.com/kazu0620/SRGVersionUpdater

'AFHTTPRequestOperationManager.h' file not foundとエラーが出ます。
どうしたらよいでしょうか？

SRGVersionUpdater.m

objectc
1#import "SRGVersionUpdater.h"
2#import "UIAlertView+BlocksKit.h"
3#import "AFHTTPRequestOperationManager.h"
4
5@implementation SRGVersionUpdater {
6    NSDictionary *versionInfo;
7}
8
9#ifndef SRGVersionUpdaterLocalizedStrings
10#define SRGVersionUpdaterLocalizedStrings(key) \
11NSLocalizedStringFromTableInBundle(key, @"SRGVersionUpdater", [NSBundle bundleWithPath:[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"SRGVersionUpdater.bundle"]], nil)
12#endif
13
14- (void) executeVersionCheck {
15   NSAssert(_endPointUrl, @"Set EndPointUrl Before Execute Check");
16    
17   AFHTTPRequestOperationManager* manager = [AFHTTPRequestOperationManager manager];
18   manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/plain",@"application/json",nil];
19   [manager GET:_endPointUrl parameters:nil
20       success:^(AFHTTPRequestOperation *operation, id responseObject) {
21           versionInfo = responseObject;
22           [self showUpdateAnnounceIfNeeded];
23       } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
24           NSLog(@"Request Operation Error! %@", error);
25       }
26   ];
27}
28
29- (void) showUpdateAnnounceIfNeeded {
30    if( ![self isVersionUpNeeded] ) {
31        return;
32    }
33    [self showUpdateAnnounce];
34}
35
36- (BOOL) isVersionUpNeeded {
37    NSString *currentVersion  = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];
38    NSString *requiredVersion = versionInfo[@"required_version"];
39    return ( [requiredVersion compare:currentVersion options:NSNumericSearch] == NSOrderedDescending );
40}
41
42- (void) showUpdateAnnounce {
43    UIAlertView *alert = [UIAlertView
44        bk_alertViewWithTitle:[self alertTitle]
45        message:[self alertBody]
46    ];
47    
48    [alert bk_addButtonWithTitle:[self updateButtonText]
49                         handler:^(void) {
50        NSURL *updateUrl = [NSURL URLWithString:versionInfo[@"update_url"]];
51        [[UIApplication sharedApplication] openURL:updateUrl];
52    }];
53    
54    if([versionInfo[@"type"] isEqualToString:@"optional"]){
55        [alert addButtonWithTitle: [self cancelButtonText]];
56    }
57    
58    [alert show];
59}
60
61- (NSString *) alertTitle {
62    return _customAlertTitle ? _customAlertTitle : [self localizedStringWithFormat:@"SRGVersionUpdater.alert.title"];
63}
64
65- (NSString *) alertBody {
66    return _customAlertBody ? _customAlertBody : [self localizedStringWithFormat:@"SRGVersionUpdater.alert.body"];
67}
68
69- (NSString *) updateButtonText {
70    return [self localizedStringWithFormat:@"SRGVersionUpdater.alert.updateButton"];
71}
72
73- (NSString *) cancelButtonText {
74    return [self localizedStringWithFormat:@"SRGVersionUpdater.alert.calcelButton"];
75}
76
77- (NSInteger) versionNumberFromString:(NSString *)versionString{
78    return [[versionString stringByReplacingOccurrencesOfString:@"." withString:@""] intValue];
79}
80
81- (NSString *) localizedStringWithFormat:(NSString *)format {
82    return SRGVersionUpdaterLocalizedStrings(format);
83}
84
85@end
86