Logo issues (SVG, PNG, transparency) + persistent save error

Hi Support-Team, hi all,

Unfortunately, I’m stuck when it comes to adding new logos to the menu. I thought SVG would be a good idea. Unfortunately, my attempts were not successful. Even reverting to the previous state didn’t work properly. I’ve spent quite some time troubleshooting and would really appreciate your help.
Setup: Enfold 7.1.4, child theme active, WordPress 6.9.4. PHP memory limit is set to 256M. Active plugins are listed in the separate system info section.
1. Logo too large: Uploaded PNG (600×44 px) displays oversized. Enfold renders height=”100″ width=”300″ regardless of actual dimensions. Header Size set to “slim”.
2. SVG logo won’t save: Uploaded SVG (877×64 px) to media library successfully. Clicking “Use Image as logo” with Full Size selected does nothing. Safe SVG 2.4.0 active.
3. Transparency logo not loading: Default logo (dark version) is set. White version is uploaded via Enfold → Header → Transparency Options → Transparency Logo. But when scrolling up to the transparent header area, the white logo does not appear — only the dark logo is shown on the dark banner.
4. Child theme CSS ignored: Custom CSS added to child theme style.css via SFTP (file content verified). CSS never loads on frontend. Autoptimize bundles all CSS and serves old cached versions. Deleted /wp-content/cache/*, emptied Autoptimize cache, hard reloaded — no effect. URLs still contain .pagespeed.ce. suffixes from server-level PageSpeed cache that cannot be cleared from WordPress.
5. “Saving didnt work”: Every save attempt in Enfold Theme Options (including Quick CSS) fails with this error. Interestingly, some changes (like switching the logo image) do seem to take effect despite the error message — but I cannot be sure which changes are actually saved and which are not. Tested in a different browser, deactivated SG Security – error persists. PHP memory limit is 256M, so that shouldn’t be the cause.

What I’ve already tried:
Clearing all caches (Autoptimize, WP Super Cache, admin bar “Delete Cache”)
Manually deleting /wp-content/cache/* via SFTP
Hard reload (Ctrl+Shift+R) and incognito/private browsing
Deactivating SG Security
Increasing WP_MEMORY_LIMIT to 256M

Questions:
Do you have any ideas on how I can successfully incorporate both new logos?
Why does Enfold hardcode width=”300″ height=”100″ on logo images ignoring actual dimensions?
Why does SVG logo selection not save?
Why does the transparency logo not display on the transparent header?
What causes the persistent “Saving didnt work” error — and why do some changes save despite the error?
How to make child theme CSS load when Autoptimize + server-level PageSpeed cache everything?

Many thanks for your help!
Kind regards,
bleistift

• This topic was modified 3 hours, 15 minutes ago by bleistift.