I have been encountering the same issue using both edge chromium and also firefox.
The error is
Warning: Undefined variable $finished in _batch_process() (line 355 of core/includes/batch.inc).
_batch_process(Array) (Line: 186)
_batch_progress_page() (Line: 86)
_batch_page(Object) (Line: 666)
install_run_task(Array, Array) (Line: 571)
install_run_tasks(Array, NULL) (Line: 119)
install_drupal(Object) (Line: 48)
Warning: Undefined variable $finished in _batch_process() (line 355 of core/includes/batch.inc).
_batch_process(Array) (Line: 186)
_batch_progress_page() (Line: 86)
_batch_page(Object) (Line: 666)
install_run_task(Array, Array) (Line: 571)
install_run_tasks(Array, NULL) (Line: 119)
install_drupal(Object) (Line: 48)
Warning: Undefined variable $finished in _batch_process() (line 355 of core/includes/batch.inc).
_batch_process(Array) (Line: 186)
_batch_progress_page() (Line: 86)
_batch_page(Object) (Line: 666)
install_run_task(Array, Array) (Line: 571)
install_run_tasks(Array, NULL) (Line: 119)
install_drupal(Object) (Line: 48)
Warning: Undefined variable $finished in _batch_process() (line 355 of core/includes/batch.inc).
_batch_process(Array) (Line: 186)
_batch_progress_page() (Line: 86)
_batch_page(Object) (Line: 666)
install_run_task(Array, Array) (Line: 571)
install_run_tasks(Array, NULL) (Line: 119)
install_drupal(Object) (Line: 48)
Warning: Undefined variable $finished in _batch_process() (line 355 of core/includes/batch.inc).
_batch_process(Array) (Line: 186)
_batch_progress_page() (Line: 86)
_batch_page(Object) (Line: 666)
install_run_task(Array, Array) (Line: 571)
install_run_tasks(Array, NULL) (Line: 119)
install_drupal(Object) (Line: 48)
Warning: Undefined variable $finished in _batch_process() (line 355 of core/includes/batch.inc).
_batch_process(Array) (Line: 186)
_batch_progress_page() (Line: 86)
_batch_page(Object) (Line: 666)
install_run_task(Array, Array) (Line: 571)
install_run_tasks(Array, NULL) (Line: 119)
install_drupal(Object) (Line: 48)
Warning: Undefined variable $finished in _batch_process() (line 355 of core/includes/batch.inc).
_batch_process(Array) (Line: 186)
_batch_progress_page() (Line: 86)
_batch_page(Object) (Line: 666)
install_run_task(Array, Array) (Line: 571)
install_run_tasks(Array, NULL) (Line: 119)
install_drupal(Object) (Line: 48)
Warning: Undefined variable $finished in _batch_process() (line 355 of core/includes/batch.inc).
_batch_process(Array) (Line: 186)
_batch_progress_page() (Line: 86)
_batch_page(Object) (Line: 666)
install_run_task(Array, Array) (Line: 571)
install_run_tasks(Array, NULL) (Line: 119)
install_drupal(Object) (Line: 48)
Warning: Undefined variable $finished in _batch_process() (line 355 of core/includes/batch.inc).
_batch_process(Array) (Line: 186)
_batch_progress_page() (Line: 86)
_batch_page(Object) (Line: 666)
install_run_task(Array, Array) (Line: 571)
install_run_tasks(Array, NULL) (Line: 119)
install_drupal(Object) (Line: 48)
Warning: Undefined variable $finished in _batch_process() (line 355 of core/includes/batch.inc).
_batch_process(Array) (Line: 186)
_batch_progress_page() (Line: 86)
_batch_page(Object) (Line: 666)
install_run_task(Array, Array) (Line: 571)
install_run_tasks(Array, NULL) (Line: 119)
install_drupal(Object) (Line: 48)
Warning: Undefined variable $finished in _batch_process() (line 355 of core/includes/batch.inc).
_batch_process(Array) (Line: 186)
_batch_progress_page() (Line: 86)
_batch_page(Object) (Line: 666)
install_run_task(Array, Array) (Line: 571)
install_run_tasks(Array, NULL) (Line: 119)
install_drupal(Object) (Line: 48)
The installation progress bar froze unless I refreshed the page and then at the end of the installation, these errors shows, and I had to reload the install.php page for it to enable me to enter my site details. then when I got into my site, these errors shows up again, and if I tried to navigate the size, I got the message (site) Apologizes for any inconvenience caused by this error. Error 500
This is installed using a hosting provider, and the database is 10.4.26-MariaDB-log - MariaDB Server
I am using PHP version 7.4