@manton FWIW, I have not been able to attach photos when posting to my WordPress blog (Rhoneisms) for months. Get a "parse error. not well formed (error -32700)). Used to work fine. Just started happening one day. Posting without photo works fine. Tried deleting app and data and re-setting up; no change. Did not send to @help because I suspect it is an issue with my WordPress.
@cdevroe I’ve got a bit in my WordPress functions.php that fixes the comments issue. My original code was improved by @colinwalker it is in the end of second section of this gist NB I don’t use all of the functions.php file anymore & any bits I wrote as opposed to borrowed should be treated with caution.
Also, what size limitation for files is set on your WordPress blog or PHP in general? The setting is uploadmaxfilesize. That may also create an error.
Lastly, have you tried with different files? WordPress rejects HEIC files directly from iPhone.