snap, latest version, fedora 30

I entered a search term in the search interface for google scholar. the search started - and then I got this exception:

org.jabref.logic.importer.FetcherException: Error while fetching from Google Scholar
at org.jabref.logic.importer.fetcher.GoogleScholar.performSearch(GoogleScholar.java:153)
at org.jabref.gui.importer.fetcher.WebSearchPaneViewModel.lambda$search$1139(WebSearchPaneViewModel.java:97)
at org.jabref.gui.util.BackgroundTask$1.call(BackgroundTask.java:46)
at org.jabref.gui.util.DefaultTaskExecutor$1.call(DefaultTaskExecutor.java:122)
at javafx.concurrent.Task$TaskCallable.call(Task.java:1423)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: Server returned HTTP response code: 403 for URL: https://scholar.googleusercontent.com/scholar.bib?q=info:yIP-zWE6ZqwJ:scholar.google.com/&output=citation&scisdr=CgXdNNZ6GAA:AAGBfm0AAAAAXPU6xHYhRX7Xs4yGmuGvKxLqyQeM4dUC&scisig=AAGBfm0AAAAAXPU6xIu1hJIjm2jhGlAmUDqtFEKPY5fF&scisf=4&ct=citation&cd=2&hl=en
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1944)
at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1939)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1938)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1508)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:263)
at org.jabref.logic.net.URLDownload.asString(URLDownload.java:203)
at org.jabref.logic.net.URLDownload.asString(URLDownload.java:217)
at org.jabref.logic.importer.fetcher.GoogleScholar.downloadEntry(GoogleScholar.java:170)
at org.jabref.logic.importer.fetcher.GoogleScholar.addHitsFromQuery(GoogleScholar.java:164)
at org.jabref.logic.importer.fetcher.GoogleScholar.performSearch(GoogleScholar.java:135)
... 10 more
Caused by: java.io.IOException: Server returned HTTP response code: 403 for URL: https://scholar.googleusercontent.com/scholar.bib?q=info:yIP-zWE6ZqwJ:scholar.google.com/&output=citation&scisdr=CgXdNNZ6GAA:AAGBfm0AAAAAXPU6xHYhRX7Xs4yGmuGvKxLqyQeM4dUC&scisig=AAGBfm0AAAAAXPU6xIu1hJIjm2jhGlAmUDqtFEKPY5fF&scisf=4&ct=citation&cd=2&hl=en
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1894)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:347)
at org.jabref.logic.net.URLDownload.openConnection(URLDownload.java:319)
... 15 more