I recently returned to a notebook I was using for scientific data analysis late last year, before the shutdown. It had previously worked perfectly to generate graphs, using SemanticImport to load some spreadsheets into WolframCloud.

When I tried to rerun the code however, with no changes made whatsoever, an error message now appears that says: "the operation SemanticImport is not allowed while running in sandbox mode."

I have searched the internet high and low, and cannot find anything about sandbox mode in Wolfram Cloud, any changes made to SemanticImport, or any reason why this is suddenly occurring. Here is the code as it stands currently:

SetDirectory["/wolframcloud/userfiles/a7c/a7c42d7e-2147-437c-b144-\
6fa492c2ed8a/CD8-Analysis/Sample-IVIS-Data"]

"/wolframcloud/userfiles/a7c/a7c42d7e-2147-437c-b144-6fa492c2ed8a/CD8-\
Analysis/Sample-IVIS-Data"

cd8pilum = 
 SemanticImport[
  "CD8-PI.xlsx", {"String", "Number", "Number", "Number", "Number", 
   "Number", "Number", "Number", "Number", "Number", "Number"}]
cd8pdlum = 
 SemanticImport[
  "CD8-PD.xlsx", {"String", "Number", "Number", "Number", "Number", 
   "Number", "Number", "Number", "Number"}]
cd8vilum = 
 SemanticImport[
  "CD8-VI.xlsx", {"String", "Number", "Number", "Number", "Number", 
   "Number", "Number", "Number", "Number", "Number", "Number"}]
cd8vdlum = 
 SemanticImport[
  "CD8-VD.xlsx", {"String", "Number", "Number", "Number", "Number", 
   "Number", "Number", "Automatic", "Automatic"}]

Any help or guidance would be greatly appreciated