Atlaskit Editor Core - Window not defined error

Hi,

I’ve been experiencing issues when trying to use the editor-core package in my connect express app.

I get the following error inside the iframe in Jira:

/home/stv/Projects/atlas-sp/node_modules/@atlaskit/smart-card/dist/cjs/client/utils/environments.js:1
ReferenceError: window is not defined
    at getBaseUrl (/home/stv/Projects/atlas-sp/node_modules/@atlaskit/smart-card/dist/cjs/client/utils/environments.js:28:3)
    at new EditorCardProvider (/home/stv/Projects/atlas-sp/node_modules/@atlaskit/smart-card/dist/cjs/providers/editor/index.js:31:49)
    at Object.<anonymous> (/home/stv/Projects/atlas-sp/node_modules/@atlaskit/smart-card/dist/cjs/providers/editor/index.js:263:26)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1035:10)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1035:10)

I have tried installing my packages with both yarn and npm and I still get the same error.

My node version is 12.19.0

My npm version is 6.14.8

My dependencies are

   "@atlaskit/button": "^15.1.0",
    "@atlaskit/dynamic-table": "^14.1.4",
    "@atlaskit/editor-core": "^134.0.1",
    "@atlaskit/icon": "^21.1.4",
    "@atlaskit/media-core": "^32.1.2",
    "@atlaskit/section-message": "^5.0.7",
    "@atlaskit/select": "^13.0.6",
    "@atlaskit/smart-card": "^14.6.1",
    "@atlaskit/spinner": "^15.0.5",
    "@atlaskit/textarea": "^4.0.1",
    "@atlaskit/textfield": "^4.0.9",
    "atlassian-connect-express": "^6.1.0",
    "body-parser": "^1.19.0",
    "compression": "^1.7.4",
    "cookie-parser": "^1.4.5",
    "errorhandler": "^1.5.1",
    "esm": "^3.2.25",
    "express": "^4.17.1",
    "express-hbs": "^2.3.4",
    "helmet": "^4.1.1",
    "morgan": "^1.10.0",
    "nocache": "^2.1.0",
    "parcel": "^1.12.4",
    "react": "^16.13.1",
    "react-dom": "^16.13.1",
    "react-intl": "^5.10.2",
    "rxjs-compat": "^6.6.3",
    "sequelize": "^6.3.5",
    "styled-components": "^5.2.0"

I have tried with @atlaskit/editor-core v125.1.1 as well with no success.

Thanks,
Steven