mapaynegmailcom

Adding:

global $wp_rewrite;
$wp_rewrite->flush_rules();

per jayminkapish’s instructions worked for me.

Given that he posted 5 months ago, how hard is it for the developer to also update those 2 lines and re-release a new version?

Ditto.
Same issue here.
C’mon people. With all the “I love flutter” comments floating around, can’t *someone* dumb it down for me?