Issue 1 – Thanks for fixing. I think you change something in evolve-plus/functions.php. Can you let me know what changed so I can update my other site with the same problem or should I copy functions.php from one site to the other?

Issue 2 – Root cause is
<b>Fatal error</b>: Maximum execution time of 30 seconds exceeded in <b>/public_html/dblog/wp-content/plugins/sucuri-scanner/sucuri.php</b>

I disabled the Sucuri plugin temporarily and was able to customize the theme. I guess I could either increase the PHP max execution time or just disable while customizing. It is strange that the other site that has Sucuri and is on the same hosting account customizes fine.