PHP Error: Deprecated: mb_convert_encoding()

[lmfukada]

Deprecated: mb_convert_encoding(): Handling HTML entities via mbstring is deprecated; use htmlspecialchars, htmlentities, or mb_encode_numericentity/mb_decode_numericentity instead in /var/www/app/plugins/MarkdownPlus/vendor/erusev/parsedown-extra/ParsedownExtra.php on line 588

[Ryonez]

Also seeing this error showing up, I'm using iframes.

[colonelpopcorn]

Parsedown might need an upgrade. I get this error when I go to a project description that's not been filled in yet:

Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /var/www/app/plugins/MarkdownPlus/vendor/erusev/parsedown/Parsedown.php on line 43