Upgrading (large upgrade) to 2.0.19

[GF-2024]

Hi,
after years of SMF I decided to upgrade from 2.0.17 to 2.0.19 or 2.1.14

I setup a testing environment (LAMP with PHP 7.0) and made o copy of the database.
I downloaded the large upgrade archive, copied it to forum folder and run the upgrade script.
I get an error that says it cannot connect to database.
Of course I filled in the fields with user name and password.
Where can I find a solution?
Thanks

[Illori]

What is repair_settings.php?

you need to run this first.

https://wiki.simplemachines.org/smf/Hosting_-_How_do_I_move_my_SMF_forum_to_a_different_host

[GF-2024]

What is repair_settings.php?

you need to run this first.

https://wiki.simplemachines.org/smf/Hosting_-_How_do_I_move_my_SMF_forum_to_a_different_host

Hi, I already did it and forum is running correctly

[GF-2024]

I understand that my previous post is not clear.
To clarify: I meant that test forum is running perfectly but I still cannot upgrade.

[Sir Osis of Liver]

If 2.0.17 forum is running correctly and 2.1.4 upgrade drops database connection, try upgrading to higher php version.  2.0.17 supports up to php 7.4.  Support for 8.0 was added in 2.0.19.  2.1.4 supports 8.1/8.2.  Run upgrade in 8.0, see what happens.