WebAdmin crash ejabberd

2020-06-02 16:16:54.063 [error] <0.10629.0>@ejabberd_http:apply_custom_headers:860 CRASH REPORT Process <0.10629.0> with 0 neighbours crashed with reason: bad argument in call to maps:from_list([html]) in ejabberd_http:apply_custom_headers/2 line 860
2020-06-02 16:16:54.063 [error] <0.733.0>@ejabberd_http:apply_custom_headers:860 Supervisor ejabberd_http_sup had child undefined started with {ejabberd_http,start_link,undefined} at <0.10629.0> exit with reason bad argument in call to maps:from_list([html]) in ejabberd_http:apply_custom_headers/2 line 860 in context child_terminated