Error: Could not connect to the database! Please, make sure the details are correct.

Yes, I did many tries but also did not work.

Some questions:

1) You are working on a Plesk online platform, maybe their support could answer what config you need to do... sometimes they have special ways to configure some dependencies (like mod_rewrite) https://akaunting.com/docs/requirements

2) Just in case, maybe it has nothing to do... but, have you created a new user for the akaunting? or just using mysql root user? can you try both?

3) Has your password letters and numbers only or has special chars like ($ % @ #)?

Sorry Sebastian, I could not get back on this before.

1) I do not have access to Plesk support sadly, but I tried Wordpress in the same domain and it also needs mod_rewrite.. The environment requirements seem OK. Maybe I am missing PHP extensions, but I recently updated all PHP and installed all the versions (to get Akaunting running I needed to)

2) I tried both :)

3) It had, but now I tried using a very simple password to test and it also did not work.

Thanks again for your help

I just found out that Tokenizer and OpenSSL PHP Extensions are not installed apparently. I'll try to fix that.

Hi Diego,

Are you able to solve the issue?.

i have same problem on my LAMP and LEMP enviroment, few days for troubleshooting, finailly found out the problem,  missing the extension php-mysql

Please add it to https://akaunting.com/docs/requirements 

Its because you have not added privileges to the db user role