WS handler error (websocket)

I keep getting this error when trying to access web sockets:

H01144: No protocol handler was valid for the URL /lool/https:%2F%2Fnextcloud.xxx.com%2Findex.php%2Fapps%2Frichdocuments%2Fwopi%2Ffiles%2F707_ocny42d5quk3?access_token=3vSpnVrTNZloGcANH1XHB1t4pITxnjpH&access_token_ttl=0&reuse_cookies=__cfduid%3Dd51b54b2fbb6ab34ef2050f57406949d71569814012&permission=edit/ws (scheme ‘ws’). If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.

Here are the modules I’m using (mod_proxy is a DSO or dynamic shared object):
Loaded Modules:
core_module (static)
so_module (static)
watchdog_module (static)
http_module (static)
log_config_module (static)
logio_module (static)
version_module (static)
unixd_module (static)
access_compat_module (shared)
alias_module (shared)
auth_basic_module (shared)
authn_core_module (shared)
authn_file_module (shared)
authz_core_module (shared)
authz_host_module (shared)
authz_user_module (shared)
autoindex_module (shared)
deflate_module (shared)
dir_module (shared)
env_module (shared)
filter_module (shared)
mime_module (shared)
mpm_event_module (shared)
negotiation_module (shared)
proxy_module (shared)
proxy_balancer_module (shared)
proxy_connect_module (shared)
proxy_html_module (shared)
proxy_http_module (shared)
proxy_wstunnel_module (shared)
reqtimeout_module (shared)
setenvif_module (shared)
slotmem_shm_module (shared)
socache_shmcb_module (shared)
ssl_module (shared)
status_module (shared)
xml2enc_module (shared)

I’m running apache as the