\cog-map\node_modules\ol\map.js: Cannot delete property 'internal' of #<Object>

[dadream]

PS F:\cog-test\cog-map> npm start

ol-parceljs@1.0.0 start F:\cog-test\cog-map
parcel index.html

Server running at http://localhost:1234
× F:\cog-test\cog-map\node_modules\ol\map.js: Cannot delete property 'internal' of #
at Function. (F:\cog-test\cog-map\node_modules\parcel-bundler\lib\transforms\babel.js:43:14)
at next (native)
at step (F:\cog-test\cog-map\node_modules\parcel-bundler\lib\transforms\babel.js:244:191)
at F:\cog-test\cog-map\node_modules\parcel-bundler\lib\transforms\babel.js:244:361