Please note that the Bank Connect App is compatible with Business Central's current and next major release, version 26+.
The Business Central version can be found by selecting the (?) icon at the top right corner of your page. Then, select Help & Support, which is located under the Other Resources section.
In the Help & Support prompt, scroll to the Troubleshooting section and see the Business Central version. Make sure you are on version 26 or higher before installing an app. This will ensure you can download the latest version of the Bank Connect and have access to the latest features and improvements.
If you want more information, see this help article: Version Numbers in Business Central.