Can’t upgrade WP 5.6 to 5.6.1: version-current.php is missing

Fast and easy solution would be to update manually. Download the wordpress package from wordpress.org and unpack to your server.
https://wordpress.org/support/article/updating-wordpress/#manual-update

Related Posts:

  1. WordPress 3.9 Database Update Infinite Loop
  2. Real automated and unattended wordpress upgrade including plugins
  3. Good methodology for upgrading a large/complex sites?
  4. How can the temporary update directory be changed?
  5. Why does WordPress 4.2.2 require FTP to update?
  6. Why won’t WordPress on localhost find updates?
  7. Upgrading from 3.5.2 to 3.9.1
  8. “The package could not be installed” when updating plugins, themes, and core files on WampServer
  9. WP 5 upgrade and ALTER TABLE wp_post … post_password
  10. How much maintenance is required to run a WordPress server?
  11. How does WordPress get the upgrade URL?
  12. How can I upgrade wordpress with manual?
  13. Get rid of Another update is currently in progress
  14. What is your best practice to execute one-time scripts?
  15. No CSS being loaded on backend
  16. Set custom messages for post update/save
  17. Auto-updating WordPress from a local zip file
  18. Permissions to get autoupdate to work
  19. Disable requests to api.wordpress.org
  20. Permissions to wp-content folder in Windows Server 2012
  21. Why is Google Webmaster Tools telling me to update WordPress
  22. Update, add, remove plugins, themes or wordpress behind load balancer
  23. How to force function to run as the last one when saving the post?
  24. Block updates by Server
  25. WordPress 5.5 AutoUpdate schedule
  26. Update exisiting site to 3.5 release candidate
  27. A Way to Auto update plugins using cron?
  28. WordPress Version 5 – Another update is currently in progress
  29. Multisite database upgrade SSL error
  30. register_activation_hook and updating
  31. Using wp-cli to Update WP Networks / Multisite from 3.5.1 to 3.8
  32. What are the details for function argument wp_update_plugin()
  33. Check if any users are logged in before running update
  34. wp core update not working anymore
  35. Changing plugin slug with update
  36. Necessary user, group and permissions for core updates
  37. Update Failed: There has been a critical error on your website
  38. Hook (upgrader_process_complete) running moment
  39. How to notify my plugin users about new version releases?
  40. Website not updating – no cache plugins active!
  41. Auto backup before automatic WordPress updates
  42. WordPress not showing upgrade to latest version
  43. Updating client websites on a regular basis
  44. How to do an event when any user updates their profile?
  45. Some wp-admin folder file deleted when WordPress upgrade
  46. Should I upgrade?
  47. How to display user’s nickname by default instead of username
  48. Download failed cURL error 7: . Can’t update anything
  49. Check for files and database integrity
  50. Subscribers become Authors after Upgrade? / Mass Update of Users?
  51. Install translation files that should survive updates [duplicate]
  52. Error updating WP-CLI
  53. Fresh new install or keep old version
  54. How to add new theme to running website
  55. Updating WordPress core with zero downtime – I mean zero
  56. Automatic updates and merging manual changes
  57. WordPress curl timing out and saying ‘Moved Permanently’
  58. Replace or Alter the wp_version_check() Function
  59. New version doesn’t show up
  60. Custom theme updater – random string in new theme name
  61. An update has caused my client’s site to be non-existent after new update of WordPress [closed]
  62. Updating a page won’t have any effect
  63. Translation update successful but apparently not
  64. WordPress update messed special characters
  65. Is the root index.php file part of the Core?
  66. 3.1 update erases customized function page?
  67. theme upgrade failing
  68. cannot update wordpress from 3.4.2 to 3.5
  69. How to back up and up date a site to a newer version?
  70. Site Cookie Error, Redirection and Blank Pages after Upgrade
  71. How to automate post update website check?
  72. opcache_reset on plugin/theme/core update
  73. Plugin upgrade failing during unzip
  74. Which directories does WordPress attempt to create when updating core and installing plugins?
  75. Constant for ‘barebones’ update of WordPress
  76. Reliability of WordPress 4 one click update
  77. Can an update corrupt my installation?
  78. Can I Update WordPress 2.9.2. to 3.0.4 from admin
  79. WordPress current version is 5.7.5 but I’m being prompted to “upgrade” to 4.9
  80. Can not save changes after an edit
  81. Updatable theme developing
  82. Auto Update A WordPress Plugin from within another WordPress Manager Plugin
  83. Can I replace the “Upgrade Network” with SQL query?
  84. How to force an update of WordPress core to a newer minor version, using the Dashboard?
  85. What happend if I update my website?
  86. WordPress Not updating – No Cache Plugins, Admin sees updates
  87. Remote site behind VPN – how to allow core & plugin updates?
  88. Correct procedure for fixing broken WP sites after WP version update
  89. Update WordPress from non-public machine
  90. cannot update ftp credentials even when group owner has write access
  91. WordPress NOT notifying of new update in dashboard
  92. What could have changed all of the ' characters in my content to &#039 strings?
  93. Updating from WordPress 3.5.2 to 3.6 Errors
  94. Autoupdate shows current when I’m on 3.1
  95. Restoring from a Backup after Update
  96. WordPress 4.8.2 redirects back after install and asks to delete/change config
  97. Hook or function to check if performing a WP Core update?
  98. How to update WordPress plugins properly using git?
  99. add_editor_style not working after upgrade to WP v 6.2
  100. WordPress is updating only patch version and not minor