I ran the path tester on the control panel and the ubbt_test.php, all looked good.

System Requirements Met
Your system meets all of the PHP requirements for UBB.threads:
Minimum Version: v7.7.0
Maximum Version: v7.7.x

Possible Problems
Possible problems have been detected, please see the individual messages below for more information.

The required PHP extension "mysql_connect" (MySQL Connect) could not be found. This error is non-crucial if the "mysqli_connect" function exists and you are running UBB.threads v7.7.0 or newer. Please see UBBWiki: mysql_connect

You have indicated that you would like to test your UBB.threads configuration, but the file could not be found in the path: forum/includes/config.inc.php

Additional Information

Compatible UBB.threads Versions:
Minimum: v7.7.0
Maximum: v7.7.x
Read more about Server Requirements and Suggestions on UBBWiki
cURL Version: 7.68.0
File Get Contents: Allows External URLs
GZip: GZip is supported on this system
ImageMagick: ImageMagick binaries were located in the folder /usr/bin/ (/usr/bin/convert and /usr/bin/mogrify)
Maximum Execution Time (max_execution_time): 60 Seconds
Maximum Input Variables (max_input_vars): 2000 (see php.net for more information)
Maximum Upload File Size (upload_max_filesize): 40M (see php.net for more information)
Maximum Upload Size Allowed: 40M (the smaller of post_max_size vs upload_max_filesize)
Memory Limit: 512M
MySQL: MySQL v5.0 or newer is required; please manually check that you meet this requirement.
OpenSSL Version: OpenSSL 1.1.1d 10 Sep 2019
PHP Interface: fpm-fcgi
PHP Version: 7.2.26
Post Max File Size (post_max_size): 40M (can affect the upload size, see php.net for more information)
Reported Host: www.deep-blue-sea.org
Reported IP:
Reported OS: Linux
Reported Path: /opt/bitnami/nginx/html
Reported Port: 443 (443 indicates SSL)
Secure Connection (HTTPS/SSL): Yes
Time: The current, unadjusted, server time is: Tuesday, May 26th, 2020 at 12:09 AM, UTC (+00:00)
ZLib: ZLib is supported on this system