How do I fix a permalink that keeps adding an extra part on the end and leading to a 404 error page?

Related Posts:

1. After server migration only the homepage works
2. Changing permalinks gives me 404 errors on nginx
3. Setting 404 page in Nginx
4. Including category-base in a post permalink results in 404
5. WordPress thinks my custom route is a 404
6. Homepage loads but all permalinks are 404 when using nginx & PHP-FPM
7. 404 on category.php pagination
8. Posts not working on windows after changing permalinks
9. removed index.php now all pages 404
10. Redirect old permalinks with Month and name to Post name on new site
11. Permalinks Structure and 404 Question
12. Attachment page 404 not found when image is attached to post
13. After moving from subdirectory to home, home page does not display
14. Changes to permalink structure results in 404 error for all pages other than home
15. permalink changed, now getting 404 for every pages
16. Permalinks broken regularly
17. 404 Page Not Found for Only One Post
18. Permalink /%category%/%postname%/ returns 404 on OSX
19. Permalinks keep reverting to 404 unless I re-save them
20. Clean install – Changing permalinks in twentyeleven give 404
21. Problems redirecting to “pretty” permalinks (wordpress in Subdirectory)
22. Permalink change made author archive vanished
23. Permalinks okay some pages but 404 error on others
24. AWS WordPress Install – pages/posts 404 on restart until updating permalinks
25. WordPress 404 in development area
26. Permalinks by page/post name returning 404
27. Custom Permalink
28. Editing Pages Give 404 Error After WordPress Upgrade in Admin Panel
29. page nested 3 levels deep shows 404
30. Changing the post date without causing 404 error
31. Nginx Rewrite Rule:: index.html added to every permalink
32. Moving local wordpress page to a real server subdomain broke my permalinks?
33. How to make /search/ without parameters not return a 404?
34. 404 Error Problems with sCategory Permalink plugin
35. Why does the ‘Month and Name’ Permalink Format not Work on my new WordPress Site (running on IIS7)?
36. WordPress post-name permalink redirects to site.com
37. Page preview is shown, updating page gives 404 error
38. Edit page slug after save, cause 404 by linked pages
39. Unable to get /%postname%/ permalinks working, 404 on all links
40. Correct permalinks and 404-error
41. What would cause a theme to add extra characters to blog post links?
42. Permalink Doesnt Work – URL Not Found
43. Getting 404 when Access post which name start with Digit
44. 404 when going to /blog
45. Permalinks 404 error with HTTPS host
46. Permalinks stopped working – NO update, mod_rewrite enabled, .htaccess not touched
47. WordPress can generate numeric permalinks, which then 404
48. Custom permalink structure gives 404
49. Accessing Subdirectories in WordPress Install
50. Post preview gives 404 when permalinks are purely date based
51. WordPress suddenly changed all links to example.com/example.com/
52. Resolve 404 on posts without category
53. Permalinks on post is working, on pages 404 error
54. Visiting posts results in 404 errors after host migration
55. How do I change the permalink structure without getting 404s?
56. 404 permalink errors on Pages only
57. 404 on internal pages, in all sites in my local server
58. Home page Pagination – Other pages do not redirect to home page template
59. WordPress pages and posts are redirecting to server IP address instead of domain URL [closed]
60. Page redirect to 404 when set Permalink = “Post Name”
61. Fix 404 error after changing permalink structure
62. Why does enabling Permalinks make pages not found?
63. WordPress Permalinks 404 bug with “next” button
64. Changing permalink settings causes 404
65. Main blog page works but title says Page not found
66. how to set up wp in folder within static website?
67. permalink and add_rewrite_rule – error 404
68. WordPress permalink change causes all incoming links to give 404 errors
69. using wp_redirect to redirect to a permalink
70. old permalinks not found
71. The requested URL was not found on this server [closed]
72. WP-e-commerce (getshopped) – Annoying permalink issue [closed]
73. Browsing to permalink prefix results in 404
74. Problem with special character WordPress
75. Xampp 7.3.3 fresh install of WordPress 404 pages unless permalink is set to plain
76. MySQL-inserted custom taxonomy term lead to 404, flush rewrites doesn’t help
77. WordPress /page/2 gives 404 when custom permalinks is set to %category%%postname%
78. Custom structure permalink preventing 404
79. Extending page urls without getting a 404
80. I have a 404 error on all my pages! What do I do?
81. Giving specific category posts its own permalink structure returns 404
82. 404 on pretty permalinks when serving via HTTPS
83. 404 error on published page with specific permalink
84. Permalink issue with WordPress Site at domain root and another WordPress Site in a Subfolder
85. 404 page not found – Yet open admin page it works
86. Custom permalink gives 404 error only in some pages
87. Woocommerce product page 404 not found
88. Every sub page shows Error 404, i have check permalink but still same issues
89. Remove Permalink of certain posts
90. Problem with permalinks
91. wp_dropdown_categories links 404
92. HTTPS permalinks resulting in 404
93. LetsEncrypt WordPress on the Raspberry Pi – Nice url’s give 404 with https, http works
94. Permalink Rewrite with Archive – Archive gets 404
95. Change the permalinks structure
96. When using number in url it is redircting to same page but when using character it redirects to 404
97. Page_link change
98. Accidentally changed the permalink structure
99. Folder Name and Category Name WordPress
100. Although rewrite engine is on, I get 404 not found on every page