I know - I have it installed on at least a half-dozen sites and I've never seen this error before! I'm posting here in hopes I'm not the first one to stumble across it and I can get some assistance trying to diagnose and resolve the issue. I don't want to leave Helium in an older version, but it breaks the website every time I try to do so. When my customizations got wiped the first time, they were all done either via the custom.scss document or by creating a custom style in the back-end. That was missing entirely the first time. I haven't had that particular error crop up again since the first time. I grabbed the error log from the host and this is what it has on it:
[31-May-2022 15:13:57 UTC] PHP Fatal error: Uncaught ScssPhp\ScssPhp\Exception\SassScriptException: $amount: Expected 20% to be within 0% and 1% in /home/xxxx/public_html/wp-content/plugins/gantry5/compat/vendor/scssphp/scssphp/src/Exception/SassScriptException.php:30
Stack trace:
#0 /home/xxxx/public_html/wp-content/plugins/gantry5/compat/vendor/scssphp/scssphp/src/Node/Number.php(269): ScssPhp\ScssPhp\Exception\SassScriptException::forArgument('Expected 20% to...', 'amount')
#1 /home/xxxx/public_html/wp-content/plugins/gantry5/compat/vendor/scssphp/scssphp/src/Compiler.php(8604): ScssPhp\ScssPhp\Node\Number->valueInRange(0, 1, 'amount')
#2 /home/xxxx/public_html/wp-content/plugins/gantry5/compat/vendor/scssphp/scssphp/src/Compiler.php(8613): ScssPhp\ScssPhp\Compiler->libTransparentize(Array)
#3 /home/xxxx/public_html/wp-content/plugins/gantry5/compat/vendor/scssphp/scssphp/src/Compiler.php(6299): ScssPhp\ScssPhp\Compiler->libFadeOut(Array, Array)
#4 /home/xxxx/public_html/wp-content/plugins/gantry5/comp in /home/t3kdfj2metyd/public_html/wp-content/plugins/gantry5/engines/nucleus/views/partials/page.html.twig on line 12