net::ERR_HTTP2_SERVER_REFUSED_STREAM

Attach the following commands output

• lsb_release -a : Debian GNU/Linux 10 (buster)
• nginx -V : nginx/1.19.2 (VirtuBox Nginx-ee)

Describe the bug
Hello, I have random issues for displaying images on a vue.js frontend website :
net::ERR_HTTP2_SERVER_REFUSED_STREAM
is displayed in console and images are not loaded.
Any idea ?

[NatSch45]

Just got the same issue while fetching JSON data.
Many icons can't be displaying and I can't figure out why.
(sometimes it correctly displays icons btw)