Seeing a 500 error loading cs.js when attempting to view preview when editing a page.
Viewing the error in chrome dev console shows:
VM1698:1 POST https://sewdarnscrappy.com/ 500 (Internal Server Error)
Expanding this shows the following:
(anonymous) @ VM1698:1 send @ jquery.js?ver=1.12.4:4 ajax @ jquery.js?ver=1.12.4:4 (anonymous) @ cs.js?ver=3.2.4:124 (anonymous) @ cs-vendor.js?ver=3.2.4:2937 e @ cs-vendor.js?ver=3.2.4:2937 requestHTML @ cs.js?ver=3.2.4:116 generateIframe @ cs.js?ver=3.2.4:111 e._run @ cs-vendor.js?ver=3.2.4:854 (anonymous) @ cs-vendor.js?ver=3.2.4:847 setTimeout (async) r.setTimeout @ cs-vendor.js?ver=3.2.4:811 e.debounce @ cs-vendor.js?ver=3.2.4:846 st.debounce @ cs-vendor.js?ver=3.2.4:1757 generateIframeDebounce @ cs.js?ver=3.2.4:102 didInsertElement @ cs.js?ver=3.2.4:108 trigger @ cs-vendor.js?ver=3.2.4:2623 n @ cs-vendor.js?ver=3.2.4:2524 n.didCreate @ cs-vendor.js?ver=3.2.4:1118 e.commit @ cs-vendor.js?ver=3.2.4:650 e.commit @ cs-vendor.js?ver=3.2.4:670 a.commit @ cs-vendor.js?ver=3.2.4:1238 e._renderRoots @ cs-vendor.js?ver=3.2.4:1372 e._renderRootsTransaction @ cs-vendor.js?ver=3.2.4:1376 e._renderRoot @ cs-vendor.js?ver=3.2.4:1370 e._appendDefinition @ cs-vendor.js?ver=3.2.4:1367 e.appendOutletView @ cs-vendor.js?ver=3.2.4:1365 e.invoke @ cs-vendor.js?ver=3.2.4:800 e.flush @ cs-vendor.js?ver=3.2.4:789 e.flush @ cs-vendor.js?ver=3.2.4:803 e.end @ cs-vendor.js?ver=3.2.4:815 e._run @ cs-vendor.js?ver=3.2.4:854 e.run @ cs-vendor.js?ver=3.2.4:823 st @ cs-vendor.js?ver=3.2.4:1749 (anonymous) @ cs.js?ver=3.2.4:4 w @ cs-vendor.js?ver=3.2.4:2916 N @ cs-vendor.js?ver=3.2.4:2924 E @ cs-vendor.js?ver=3.2.4:2922 e.invoke @ cs-vendor.js?ver=3.2.4:800 e.flush @ cs-vendor.js?ver=3.2.4:789 e.flush @ cs-vendor.js?ver=3.2.4:803 e.end @ cs-vendor.js?ver=3.2.4:815 e._run @ cs-vendor.js?ver=3.2.4:854 e.run @ cs-vendor.js?ver=3.2.4:823 st @ cs-vendor.js?ver=3.2.4:1749 (anonymous) @ cs.js?ver=3.2.4:1729 (anonymous) @ cs.js?ver=3.2.4:1728 w @ cs-vendor.js?ver=3.2.4:2916 N @ cs-vendor.js?ver=3.2.4:2924 E @ cs-vendor.js?ver=3.2.4:2922 e.invoke @ cs-vendor.js?ver=3.2.4:800 e.flush @ cs-vendor.js?ver=3.2.4:789 e.flush @ cs-vendor.js?ver=3.2.4:803 e.end @ cs-vendor.js?ver=3.2.4:815 e._run @ cs-vendor.js?ver=3.2.4:854 e.run @ cs-vendor.js?ver=3.2.4:823 st @ cs-vendor.js?ver=3.2.4:1749 (anonymous) @ cs.js?ver=3.2.4:1736 (anonymous) @ jquery.js?ver=1.12.4:2 i @ jquery.js?ver=1.12.4:2 fireWith @ jquery.js?ver=1.12.4:2 y @ jquery.js?ver=1.12.4:4 c @ jquery.js?ver=1.12.4:4 XMLHttpRequest.send (async) (anonymous) @ VM1698:1 send @ jquery.js?ver=1.12.4:4 ajax @ jquery.js?ver=1.12.4:4 submitRequest @ cs.js?ver=3.2.4:1736 (anonymous) @ cs.js?ver=3.2.4:1726 (anonymous) @ cs-vendor.js?ver=3.2.4:2937 e @ cs-vendor.js?ver=3.2.4:2937 promise @ cs.js?ver=3.2.4:1726 requestBatch @ cs.js?ver=3.2.4:1728 e._run @ cs-vendor.js?ver=3.2.4:854 (anonymous) @ cs-vendor.js?ver=3.2.4:847 setTimeout (async) r.setTimeout @ cs-vendor.js?ver=3.2.4:811 e.debounce @ cs-vendor.js?ver=3.2.4:846 st.debounce @ cs-vendor.js?ver=3.2.4:1757 (anonymous) @ cs.js?ver=3.2.4:1723 (anonymous) @ cs-vendor.js?ver=3.2.4:2937 e @ cs-vendor.js?ver=3.2.4:2937 request @ cs.js?ver=3.2.4:1722 modelRequest @ cs.js?ver=3.2.4:1721 (anonymous) @ cs.js?ver=3.2.4:3 (anonymous) @ cs-vendor.js?ver=3.2.4:2937 e @ cs-vendor.js?ver=3.2.4:2937 _request @ cs.js?ver=3.2.4:3 findRecord @ cs.js?ver=3.2.4:2 (anonymous) @ cs-vendor.js?ver=3.2.4:10942 _fetchRecord @ cs-vendor.js?ver=3.2.4:10944 h @ cs-vendor.js?ver=3.2.4:10948 _flushPendingFetchForType @ cs-vendor.js?ver=3.2.4:10955 n @ cs-vendor.js?ver=3.2.4:1776 e.forEach @ cs-vendor.js?ver=3.2.4:1771 e.forEach @ cs-vendor.js?ver=3.2.4:1776 flushAllPendingFetches @ cs-vendor.js?ver=3.2.4:10947 e.invoke @ cs-vendor.js?ver=3.2.4:800 e.flush @ cs-vendor.js?ver=3.2.4:789 e.flush @ cs-vendor.js?ver=3.2.4:803 e.end @ cs-vendor.js?ver=3.2.4:815 e._runExpiredTimers @ cs-vendor.js?ver=3.2.4:861 _boundRunExpiredTimers @ cs-vendor.js?ver=3.2.4:811 setTimeout (async) r.setTimeout @ cs-vendor.js?ver=3.2.4:811 e._installTimerTimeout @ cs-vendor.js?ver=3.2.4:863 e._setTimeout @ cs-vendor.js?ver=3.2.4:854 e.later @ cs-vendor.js?ver=3.2.4:833 st.next @ cs-vendor.js?ver=3.2.4:1757 (anonymous) @ cs.js?ver=3.2.4:14 (anonymous) @ cs-vendor.js?ver=3.2.4:2937 e @ cs-vendor.js?ver=3.2.4:2937 model @ cs.js?ver=3.2.4:13 deserialize @ cs-vendor.js?ver=3.2.4:2025 (anonymous) @ cs-vendor.js?ver=3.2.4:2789 e.runSharedModelHook @ cs-vendor.js?ver=3.2.4:2789 n.getModel @ cs-vendor.js?ver=3.2.4:2809 w @ cs-vendor.js?ver=3.2.4:2916 N @ cs-vendor.js?ver=3.2.4:2924 E @ cs-vendor.js?ver=3.2.4:2922 e.invoke @ cs-vendor.js?ver=3.2.4:800 e.flush @ cs-vendor.js?ver=3.2.4:789 e.flush @ cs-vendor.js?ver=3.2.4:803 e.end @ cs-vendor.js?ver=3.2.4:815 e._run @ cs-vendor.js?ver=3.2.4:854 e._join @ cs-vendor.js?ver=3.2.4:853 e.join @ cs-vendor.js?ver=3.2.4:824 st.join @ cs-vendor.js?ver=3.2.4:1749 (anonymous) @ cs-vendor.js?ver=3.2.4:1753 i @ jquery.js?ver=1.12.4:2 fireWith @ jquery.js?ver=1.12.4:2 ready @ jquery.js?ver=1.12.4:2 K @ jquery.js?ver=1.12.4:2