Another dep:

package.json

@@ -5,6 +5,7 @@
     "dependencies": {
         "@quentin-sommer/react-useragent": "^3.1.0",
         "classnames": "^2.2.6",
+        "cross-fetch": "^3.0.6",
         "formik": "^2.1.4",
         "promise.any": "^2.0.1",
         "react": "^16.13.1",

yarn.lock

@@ -4841,6 +4841,13 @@ create-react-context@0.3.0, create-react-context@^0.3.0:
     gud "^1.0.0"
     warning "^4.0.3"
+cross-fetch@^3.0.6:
+  version "3.0.6"
+  resolved "https://registry.yarnpkg.com/cross-fetch/-/cross-fetch-3.0.6.tgz#3a4040bc8941e653e0e9cf17f29ebcd177d3365c"
+  integrity sha512-KBPUbqgFjzWlVcURG+Svp9TlhA5uliYtiNx/0r8nv0pdypeQCRJ9IaSIc3q/x3q8t3F75cHuwxVql1HFGHCNJQ==
+  dependencies:
+    node-fetch "2.6.1"
+
 cross-spawn@6.0.5, cross-spawn@^6.0.0, cross-spawn@^6.0.5:
   version "6.0.5"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
@@ -9618,6 +9625,11 @@ node-ensure@^0.0.0:
   resolved "https://registry.yarnpkg.com/node-ensure/-/node-ensure-0.0.0.tgz#ecae764150de99861ec5c810fd5d096b183932a7"
   integrity sha1-7K52QVDemYYexcgQ/V0Jaxg5Mqc=
+node-fetch@2.6.1:
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.1.tgz#045bd323631f76ed2e2b55573394416b639a0052"
+  integrity sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw==
+
 node-fetch@^2.6.0:
   version "2.6.0"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.0.tgz#e633456386d4aa55863f676a7ab0daa8fdecb0fd"