7 minutes ago, razaro said:First do try to use at least 5.6 even that is obsolete right now.
That error is strange but seams to have connection with /tmp folder permissions
Few first links from Google
https://serverfault.com/questions/84890/cant-create-write-to-file-tmp-sql-xxxx-myi-errcode-13
https://www.cyberciti.biz/faq/mysqld-innodb-error-unable-to-create-temporary-file/
Not sure if you have access to that folder but try mentioned changes. Or ask your hosting company to help.
And shared hosting is generally not recommended.
PHP 5.6 is the recommended version for 1.6.1.7?
We want to keep this site as it is for now, so just want to fix this issue, It is a small company, no resources for updating all the time.
I'll consider moving to a not shared hosting, but a cloud one, if the problem doesn't get solved.
The hosting company is not really the best and most competent I've worked with, really... but now that I have more clues on what is the exact problem I'll call them again to see if this gets solved.
Thanks, the debug mode really helped I dont know why I didnt think about it earlier...