Error while working on Fabric notebook - "Cannot connect to collaboration server. File is locked for edits and saves. Try reconnecting. If that doesn't work you can continue editing without reconnecting. Making edits without reconnecting may cause conflicts." Please anyone can share some insights . Could be basic issue but unable to figure out

Hi @Will Needham I have started working on Fabric and basically my need is to build BI reports/dashboards. Until fabric was available was using Power BI connecting to data sources and building the reports. Did not have a Data warehouse as of now as we stared using Power BI also 3 month ago. Instead of having an on-prem DW was considering to setup everything in Fabric. So this is where i am. I am considering to understand what my fundamental architecture should be with current needs and upcoming needs in future. We don't have on-prem data sources from where i need to get data and build reports that i have on my way. Basically majority of my reports will be single or multiple data sources like 1) AS400/ SQL/Excel files/Oracle DB 2) Information from online web portal from where data can be exported to excel or can connect the portals/ Cloud application like Jira cloud/ Cloud HRMS solutions. SO for the above Power BI report needs what is the appropriate architecture i should consider. I do not have Python expertise but have team that can help but good T-SQL exposure. Mainly i want to know how my architecture should be built so my current needs and future needs can be taken care without major changes. I have read about Medallion Architecture but not sure how i should define considering above needs