QB Issue Resolution:

First you need to disconnect the app.   And then click connect accounts on the banking screen and PayPal and use your username and password to reconnect.

Resolution for Issue 'How do i reconnect Paypal to the Banking Center?' available: Yes (Solved).
Source: Intuit Community forum.

How do i reconnect Paypal to the Banking Center?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for banking center
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Error Recovery for banking center [Canada]
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