Updated Bokeh and now just get blank screen

Are there any errors/messages in JS console?

Good call. I checked the console for errors before as included in the original post, but didn’t think about checking again. The most recent run was using both BOKEH_MINIFIED=False and BOKEH_LEGACY=True and there were a whole host of errors. This is the information contained in the web console.

mutating the [[Prototype]] of an object will cause your code to run very slowly; instead create the object with the correct initial [[Prototype]] value using Object.create bokeh.legacy.js:176:15
"[bokeh] setting log level to: 'info'" bokeh.legacy.js:8773:0
"[bokeh]" "Websocket connection 0 is now open" bokeh.legacy.js:53720:12
"[bokeh]" "Server sent key x but we don't seem to have it in our JSON" bokeh.legacy.js:4746:20
"[bokeh]" "Server sent key y but we don't seem to have it in our JSON" bokeh.legacy.js:4746:20
console.trace(): bokeh.legacy.js:53709
_/ClientConnection.prototype._repull_session_doc/ClientConnection</<() bokeh.legacy.js:53709
step() bokeh.legacy.js:311
_/__generator/verb/<() bokeh.legacy.js:260
fulfilled9) bokeh.legacy.js:234

"[bokeh]" "Failed to repull session Error: unknown property Line.undefined" bokeh.legacy.js:53710:28

"[bokeh]" "Failed to load Bokeh session mhJK42nzNjn2K5n76T6joUlmM7iYz10kVwG26KKU9E0i: Error: unknown property Line.undefined" bokeh.legacy.js:53487:24

"Error rendering Bokeh items:" Error: unkown property Line.undefined
Stack trace:

followed by a whole bunch of letters and numbers that I don’t want to retype since I am retyping all of this over from a separate computer that doesn’t have internet access.