Supporter Toolbox - useful links for your (WordPress) support

linklist.md

Disable all plugins / use standard theme and tech details

https://wordpress.org/plugins/health-check/

Change PHP Version

https://inpsyde.com/deutsche-hoster-und-php-version-wechseln-so-gehts/

Image upload: debug http error

https://sebastian.expert/fix-wordpress-an-error-occurred-in-the-upload-please-try-again-later/

Memory exhausted: Test your real memory limit

https://schnurpsel.de/wp-content/uploads/2009/12/memory-test.zip

Problems with https connection to wordpress.org: Check https connection to wp.org (included in Health Check)

http://dd32.id.au/uploads/2013/10/https-debugger.zip

Check background updates (included in Health Check)

https://wordpress.org/plugins/background-update-tester/

Check size of upload directory (included in Health Check)

https://wordpress.org/plugins/dashboard-directory-size/

Check if WP is sending mails (included in Health Check)

https://wordpress.org/plugins/check-email/

If you need answers to very basic questions, but user doesn't know ...

http://supportdetails.com/

Helpful glossary for all things WordPress

http://www.wpglossary.net

https://job.blog/2018/02/19/wordpress-troubleshooting-plugins/

https://wordpress.tv/2013/12/10/scott-basgaard-help-yourself-by-helping-others-2/
https://www.slideshare.net/scottbasgaard/help-yourself-by-helping-others