Getting following error for the code :

                                <img src="{!$ContentAsset.03S1w0000004Z6l}" alt="TLogo" class="tlogo"/> 

Error:
Failed to save xxxxxx.cmp: unexpected token: a floating point number at column 14 of expression: $ContentAsset.03S1w0000004Z6l: Source

How to create custom loging page in lightning

I'm the administrator for Salesforce in our department and I'm VERY new to this, so any help is greatly appreciated. I added a new picklist value to the existing picklist in the Custom field. I ensured it's showing in each Record type as well. The Field accessibility and field-level security seem to be set correctly. The pick list values that were already there are still visible, it's just the one I added is not. What am I missing?