Fatal errors

After installing, and adding the block to a page, I then got a PHP fatal error both on that front-end page and on the page editor in the dashboard too. So the only way out of that was to de-activate. PHP 8.2.8, current plugin release as of today.

PHP Fatal error:  Uncaught TypeError: Cannot access offset of type string on string in wp-content/plugins/donation-block-for-stripe-by-givewp/src/DonationBlock.php:82
Stack trace:
#0 wp-includes/class-wp-block.php(258): GiveDonationBlock\DonationBlock->renderBlock()
#1 wp-includes/blocks.php(1072): WP_Block->render()
#2 wp-includes/blocks.php(1110): render_block()
#3 wp-includes/class-wp-hook.php(308): do_blocks()
#4 wp-includes/plugin.php(205): WP_Hook->apply_filters()
#5 wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php(1860): apply_filters()
#6 wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php(569): WP_REST_Posts_Controller->prepare_item_for_response()
#7 wp-includes/rest-api/class-wp-rest-server.php(1181): WP_REST_Posts_Controller->get_item()
#8 wp-includes/rest-api/class-wp-rest-server.php(1028): WP_REST_Server->respond_to_request()
#9 wp-includes/rest-api.php(535): WP_REST_Server->dispatch()
#10 wp-includes/rest-api.php(2889): rest_do_request()
#11 [internal function]: rest_preload_api_request()
#12 wp-includes/block-editor.php(634): array_reduce()
#13 wp-admin/edit-form-blocks.php(77): block_editor_rest_api_preload()
#14 wp-admin/post.php(187): require('...')
#15 {main}
  thrown in wp-content/plugins/donation-block-for-stripe-by-givewp/src/DonationBlock.php on line 82