Bug: Admin panel actions do not work in Safari and Epiphany

Describe the bug

“No action selected.” error is returned from the admin pages when trying to run actions like Archive via Safari.

Steps to reproduce

1. Open http://%HOST%/admin/core/snapshot/?p=1 page
2. Select a few entries by ticking the checkboxes.
3. Click the Archive button.

Screenshots or log output

Before:

After:

• Safari 14.0.3 on latest Catalina update.
• Content blockers disabled.
• Cross-site tracking prevention disabled.
• Extensions enabled are Instapaper and Bitwarden but should not affect this.

Console does not show any errors except the favicon 404s. This exact sequence of steps works perfectly well in FF, Chrome, Brave on macOS. DOES NOT work on GNOME Web (aka Epiphany) on Linux. I tried to searching for Django Admin problems with actions in Webkit but maybe I was not making specific enough queries to pinpoint this.

ArchiveBox version

replace this line with the *full*, unshortened output of running `archivebox version`

ArchiveBox v0.5.6
Cpython Linux Linux-5.8.0-43-generic-x86_64-with-glibc2.28 x86_64 (in Docker)

[i] Dependency versions:
 √  ARCHIVEBOX_BINARY     v0.5.6          valid     /usr/local/bin/archivebox
 √  PYTHON_BINARY         v3.9.1          valid     /usr/local/bin/python3.9
 √  DJANGO_BINARY         v3.1.3          valid     /usr/local/lib/python3.9/site-packages/django/bin/django-admin.py
 √  CURL_BINARY           v7.64.0         valid     /usr/bin/curl
 √  WGET_BINARY           v1.20.1         valid     /usr/bin/wget
 √  NODE_BINARY           v15.8.0         valid     /usr/bin/node
 √  SINGLEFILE_BINARY     v0.1.14         valid     /node/node_modules/single-file/cli/single-file
 √  READABILITY_BINARY    v0.1.0          valid     /node/node_modules/readability-extractor/readability-extractor
 √  MERCURY_BINARY        v1.0.0          valid     /node/node_modules/@postlight/mercury-parser/cli.js
 √  GIT_BINARY            v2.20.1         valid     /usr/bin/git
 √  YOUTUBEDL_BINARY      v2021.02.04.1   valid     /usr/local/bin/youtube-dl
 √  CHROME_BINARY         v88.0.4324.146  valid     /usr/bin/chromium
 √  RIPGREP_BINARY        v0.10.0         valid     /usr/bin/rg

[i] Source-code locations:
 √  PACKAGE_DIR           22 files        valid     /app/archivebox
 √  TEMPLATES_DIR         3 files         valid     /app/archivebox/templates

[i] Secrets locations:
 -  CHROME_USER_DATA_DIR  -               disabled
 -  COOKIES_FILE          -               disabled

[i] Data locations:
 √  OUTPUT_DIR            13 files        valid     /data
 √  SOURCES_DIR           202 files       valid     ./sources
 √  LOGS_DIR              0 files         valid     ./logs
 √  ARCHIVE_DIR           4381 files      valid     ./archive
 √  CONFIG_FILE           1.1 KB          valid     ./ArchiveBox.conf
 √  SQL_INDEX             35.1 MB         valid     ./index.sqlite3

[rcarmo]

I can confirm this is still an issue with both desktop and mobile Safari, which makes it hard/impossible to use on an iPad.

[mdbraber]

Seems that this bug is back? Experiencing the same issue with the dev branch (and 0.6.2) on Safari 14.1 on Big Sur (11.3.1)