some general troubleshooting steps you can try:
Clear browser cache: Sometimes, browser cache can cause issues with the upgraded designer. Clear your browser cache and try accessing the Logic Apps Designer again.
Use a different browser: Try accessing the Logic Apps Designer using a different browser or an incognito/private browsing window to see if the issue persists. This helps rule out any browser-specific issues.
Check service health: Visit the Azure Service Health page (https://status.azure.com/status) or Azure Status Twitter account (@AzureSupport) to check if there are any known issues or outages affecting the Logic Apps service. Ensure that there are no service disruptions impacting the designer.
Review release notes and documentation: Check the release notes and documentation provided by Microsoft for the Logic Apps Designer upgrade. Look for any specific instructions or troubleshooting steps related to the issues you're experiencing.
Contact Microsoft Support: If the issue persists and you're unable to resolve it, reach out to Microsoft Support for assistance. They will have access to the most up-to-date information and can provide you with specific guidance or escalate the issue if necessary.
It's important to note that the ability to roll back to a previous version of the designer depends on Microsoft's policies and the specific changes made in the upgrade. Microsoft Support should be able to provide you with the most accurate information regarding rollback options, if available.
Again, please keep in mind that these are general troubleshooting steps, and it's recommended to refer to the official Microsoft documentation or contact Microsoft Support for the most accurate and up-to-date assistance for your specific issue.