Flush rewrite rules when every page gives 500 error?

Related Posts:

1. When should add_rewrite_tag() be used?
2. Why does everybody hook add_rewrite_rule on init
3. add_rewrite_rule() vs $wp_rewrite->rules vs ‘rewrite_rules_array’?
4. How to check if a rewrite rule exists
5. Querystring parameter getting lost in rewrite rule
6. Custom post types and custom variables — add_rewrite_tag() question
7. add_rewrite_rule not producing anything in $_GET
8. Flush_rewrite_rules not working when settings updated
9. WordPress Custom URL Rewrites
10. Case-insensitive add_rewrite_rules in WordPress functions
11. Does add_rewrite_rule(..) only accept “index.php” as redirect target?
12. Cyrillic characters in rewrite rules cause 404 Not Found errors
13. Custom Endpoint Gives 404 Header
14. Clean URLs for custom $_GET variables
15. Prettified page URL w/ query var redirects to prettified page URL w/o query var
16. Making extra parameters optional
17. flush_rewrite_rules() cancels the effect of add_rewrite_rule()
18. why is are these rewrite_tags and rules not working?
19. Separate posts by chapter per rewrite
20. Redirect taxonomy to custom template to list terms in taxonomy
21. How to change the matches in add_rewrite_rule
22. Using add_rewrite_rule() to redirect to Front Page
23. resolve /author/ to a page or archive (of all authors) template
24. Multiple values in a rewrite rule, is it possible?
25. What add_rewrite_tag()’s RegEx matches against?
26. add_rewrite_rule() not working
27. add_feed and flush_rewrite_rules
28. Rewrite rules and query for virtual page
29. add_rewrite_rule parameter is not received by the page
30. add_rewrite_rules prefix everything
31. Can someone explain the function of the third parameter of “add_rewrite_tag”
32. How to get a Custom 500 Error Page to show?
33. Best action to call add_rewrite_rule
34. get_query_var with add_rewrite_rule and add_filter(‘query_vars’) not working
35. Can rewrites fallback if 404? Rewrite conflict issue
36. Reading Settings -> Front Page displays “Static Page” being reset
37. add_rewrite_rule query_var not being set
38. why does add_rewrite_rule refresh and loose url variables
39. Where do I USE add_rewrite_rule?
40. add_rewrite_rule confusion
41. add_rewrite_rule isnt working, not getting added to rules array, why?
42. add_rewrite_endpoint not working
43. Associate the “add_rewrite_endpoint” and “$_GET”
44. Custom Rewrite rule to match anything not already matched by WordPress
45. Uppercase to Lowercase in URL
46. How to use rewrite rule or rewrite endpoint to switch languages?
47. Remove rewrite endpoint on deactivation?
48. Do I need to flush rewrite rules when creating new user if using custom author rewrite rules?
49. Add Rewrite Endpoint to CPT Archive
50. Optional all capture groups in rewrite rule
51. Rewrite rule : custom post type with 2 numeric variiables
52. Does it still make sense using json endpoint ep_mask now that there’s the new rest api? [closed]
53. Simple page URL rewrite with add_rewrite_rule()
54. Hooking “delete_option_rewrite_rules” for rewrite rule addition
55. Optimal code for two add_rewrite_rule’s
56. Custom URL rewrites work, but break my permalinks
57. WordPress shows front page, when it should show 404 with pagination style urls
58. add_rewrite_rule – Additional subpages for author pages
59. Rewrite rule problem
60. How do I flush rewrite rules
61. add_rewrite_rule redirects if value = 1
62. Pass query vars to front page
63. rewrite url in wordpress
64. add_rewrite_rule permalinks break in WordPress 4.5
65. How to add rewrite rule for external php file
66. Making extra parameters optional
67. My add_rewrite_rule is returning a 404
68. Rewrite rule for path of favicon.ico ( Add_rewrite_rule function possible ? )
69. wordpress add_rewrite_rule not working
70. FLUSH_REWRITE_RULES – after or before REGISTER_POST_TYPE?
71. Using get_query_var() from a plugin
72. How to flush rewrite rules on the activation of any plugin
73. force_ssl_admin() causing issues with preview links
74. $wp_rewrite->rules is always NULL
75. Rewrite without query parameter
76. WordPress CPT slug and page slug conflicts
77. Mod_rewritte – remove ?m=1 from url
78. Rewrite Rules problem when rule includes homepage slug
79. help with custom rewrite rules
80. Order of rewrite rules when calling add_rewrite_rule
81. Rewrite Rule for Post Meta
82. WooCommerce – Conditional for page created by rewrite_rule
83. add_rewrite_rule() not stored (I think)
84. custom permalink for single post category
85. WordPress add_rewrite_rule second argument not working
86. flush_rewrite_rules() not working on updating Settings API
87. WordPress rewrite does not work for some reason
88. Rewrite rules priority
89. Rewrite rules for short URL
90. Rewrite rules ignored
91. How do I turn off the blog and archives?
92. Adding a custom rewrite rule for gallery/categories page
93. add_rewrite_rule issues
94. Add_rewrite_rule doesn’t seem to work?
95. Grab last part of the url inside rule
96. add_rewrite_rule to search
97. Why isn’t my rewrite rule working when there is no second parameter?
98. Rewrite rules applied differently after upgrade
99. Leverage WP_Rewrite to pre-validate links / detect invalid links
100. How to do make mysite.com/post-name/sub-post?